Unable to use Gemini with GitHub Copilot Student

[zzsoltg]

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Please describe your Copilot technical issue
I have applied to GitHub Copilot Student subscription, which I successfully got a few days ago. I tried to use the Gemini 3.1 model in Visual Studio and also Visual Studio Code. In both IDEs, after I've sent the prompt, the following window appeared:

Enable access to the latest Gemini 3 Pro model from Google. Learn more about how GitHub Copilot serves Gemini 3 Pro.

After I clicked Confirm, the Visual Studio kept resending the dialog upwards, and the Visual Studio Code sent me the following message:

Sorry, your request failed. Please try again.
Copilot Request id: c03af766-c2c6-4702-9038-b981c411d06d
GH Request Id: CD0F:7AC41:59564F:649DE1:69BB0C4D
Reason: Request Failed: 400 {"error":{"message":"The requested model is not supported.","code":"model_not_supported","param":"model","type":"invalid_request_error"}}

I checked if it works on github.com, and I could send messages to the Gemini model, whitout any malfunction, so my subscription works perfectly.

I'm not using a proxy, a virtual private network (VPN), or a virtual machine (VM).

[Radi410]

This looks like a mismatch between your account's web permissions and the IDE's local cache. Since it works on the website but throws a "model_not_supported" 400 error in VS/VS Code, the extension is likely trying to call an API endpoint that hasn't been fully provisioned for your student seat yet. First, try signing out of GitHub within both VS Code and Visual Studio, then update the Copilot extensions to the latest "Pre-release" version if available. Once you sign back in, it should force a fresh token exchange that recognizes your Gemini 3 Pro access. If that fails, it’s a backend sync issue on GitHub's side, and you'll need to share that specific Request ID with their support team to have them manually refresh your "Copilot Student" flag.